# Relationship history for MSHA mine 3402008

Current hierarchy: **Patricia  Melton → OK Rock Quarries → Eugene West**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** OK Rock Quarries → Eugene West; 2006-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Patricia  Melton → Eugene West; 2006-05-18 to 2010-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Patricia  Melton → OK Rock Quarries; 2006-05-18 to 2010-09-30; source msha-controller-operator-history
- **controller_controls_mine:** David E  Baker → Eugene West; 2010-10-01 to 2022-06-14; source msha-controller-operator-history
- **controller_controls_operator:** David E  Baker → OK Rock Quarries; 2010-10-01 to 2022-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Patricia  Melton → Eugene West; 2022-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patricia  Melton → OK Rock Quarries; 2022-06-15 to current/open; source msha-controller-operator-history